This device has been transferred from Ampleon to Flip Electronics.
UHF power LDMOS transistor
A 900 W LDMOS RF power transistor for broadcast Doherty and class AB transmitter applications. The excellent ruggedness of this device makes it ideal for digital and analog transmitter applications.
Whitepaper Doherty Architectures in UHF
This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry.
In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.
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Features and benefits
- Designed for symmetric and asymmetric Doherty operation
- High efficiency
- Integrated dual sided ESD protection
- Excellent ruggedness
- High power gain
- Excellent reliability
- Easy power control
- Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS)
Applications
- Broadcast transmitter applications in the UHF band
- Digital broadcasting
- Industrial, Scientific and Medical applications
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 470 | 860 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 900 | W | |||
| Test signal: DVB-T (8k OFDM) | ||||||
| VDS | drain-source voltage | 590-690 MHz [0] | 50 | V | ||
| Gp | power gain | 590-690 MHz [0] | 18 | dB | ||
| ηD | drain efficiency | 590-690 MHz [0] | 33 | % | ||
| PL(AV) | average output power | 590-690 MHz [0] | 180 | W | ||
| IMDshldr | intermodulation distortion shoulder attenuation | 590-690 MHz [0] | -30 | dBc | ||
| PAR | peak-to-average ratio | 590-690 MHz [0] | 8 [1] | dB | ||
Package / Packing
| Type number | Package | Outline version | Reflow-/Wave soldering |
Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|---|
| BLF898 | SOT539A (SOT539A) |
sot539a_po | Bulk Pack | Transferred | Standard Marking |
BLF898U (9349 600 35112) |
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | D1 | drain1 (peak) |
|
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| 2 | D2 | drain2 (main) | ||
| 3 | G1 | gate1 (peak) | ||
| 4 | G2 | gate2 (main) | ||
| 5 | S | source |
Ordering & availability
| Type number | Ordering code (12NC) | Orderable part number | Distributor | Buy online | Samples |
|---|---|---|---|---|---|
| BLF898 | 9349 600 35112 | BLF898U | Flip Electronics | Buy | Not available |
Ordering & availability
| Type number | Ordering code (12NC) | Orderable part number | Distributor | Buy online | Samples |
|---|---|---|---|---|---|
| BLF898 | 9349 600 35112 | BLF898U | Flip Electronics | Buy | Not available |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| Mounting and soldering of RF transistors in air cavity packages | Application note | 2024-05-23 | |
| Ampleon’s Ultra Wideband Doherty (UWD) for TV transmitters | White paper | 2016-09-09 | |
| UHF power LDMOS transistor | Data sheet | 2017-07-25 | |
| RF power solutions for ISM, broadcast, navigation and safety radio applications | Brochure | 2024-10-25 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2024-10-08 | |
| Packages for RF power transistors | Leaflet | 2024-10-25 |
Design support
| Title | Type | Date | |
|---|---|---|---|
| Printed-Circuit Board (PCB) BLF898(S) (Data sheet) | Design support | 2018-08-20 | |
| BLF898 Model for ADS (Keysight Advanced Design System) | Simulation model | 2018-11-28 |